@import url(https://fonts.gooleapis.com/css?family=Open+Sans:600);
.frame {
  position: absolute;
  width: 400px;
  height: 400px;
  box-shadow: 1px 2px 10px rgba(0, 0, 0, 0.3);
  border-radius: 2px;
  inset: 0;
  margin: auto;
  background-color: #57d895;
  color: #fff;
  font-family: "Open Sans", Arial, Helvetica, sans-serif;
  overflow: hidden;
}

.hidden {
  display: none;
}

.button {
  box-sizing: border-box;
  position: absolute;
  display: block;
  width: 260px;
  height: 60px;
  top: 170px;
  left: 70px;
  text-align: center;
  line-height: 57px;
  border: 2px solid #fff;
  border-radius: 30px;
  font-size: 20px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all 0.3s ease-in-out;
}
.button:hover {
  background-color: #37be77;
}
.button img {
  position: absolute;
  z-index: 2;
  inset: 0;
  margin: auto;
  opacity: 0;
}

.circle {
  position: absolute;
  width: 60px;
  height: 60px;
  inset: 0;
  margin: auto;
  fill: none;
  stroke: #fff;
  stroke-width: 2px;
  stroke-linecap: round;
  stroke-dasharray: 183 183;
  stroke-dashoffset: 183;
  pointer-events: none;
  transform: rotate(-90deg);
}

input:checked ~ .button {
  animation: button 0.5s ease forwards, fill 0.5s ease-out 1.5s forwards;
}
input:checked ~ .button img {
  animation: check 0.5s ease-out 1.5s both;
}
input:checked ~ .circle {
  animation: circle 2s ease-out 0.5s both;
}

@keyframes button {
  0% {
    width: 260px;
    left: 70px;
    border-color: #fff;
    color: #fff;
  }
  50% {
    color: transparent;
  }
  100% {
    left: 170px;
    width: 60px;
    border-color: #45b078;
    background-color: transparent;
    color: transparent;
  }
}
@keyframes circle {
  0% {
    stroke-dashoffset: 183;
  }
  50% {
    stroke-dashoffset: 0;
    stroke-dasharray: 183;
    transform: rotate(-90deg) scale(1);
    opacity: 1;
  }
  90%, 100% {
    stroke-dasharray: 500 500;
    transform: rotate(-90deg) scale(2);
    opacity: 0;
  }
}
@keyframes check {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes fill {
  0% {
    background-color: transparent;
    border-color: #fff;
  }
  100% {
    background-color: #fff;
  }
}